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/*************************************************************************
** MetafontWrapper.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2010 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <cstdlib>
#include <cctype>
#include <fstream>
#include <sstream>
#include "FileSystem.h"
#include "FileFinder.h"
#include "Message.h"
#include "MetafontWrapper.h"
#ifdef __WIN32__
#include <windows.h>
#endif
using namespace std;
static int execute (const char *cmd, const char *params) {
#ifdef __WIN32__
SECURITY_ATTRIBUTES sa;
ZeroMemory(&sa, sizeof(sa));
sa.nLength = sizeof(sa);
sa.bInheritHandle = true;
STARTUPINFO si;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESTDHANDLES;
HANDLE devnull = CreateFile("nul", GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
si.hStdOutput = devnull;
PROCESS_INFORMATION pi;
ZeroMemory(&pi, sizeof(pi));
string cmdline = string("\"")+cmd+"\" "+params;
CreateProcess(NULL, (LPSTR)cmdline.c_str(), NULL, NULL, true, 0, NULL, NULL, &si, &pi);
WaitForSingleObject(pi.hProcess, INFINITE);
DWORD exitcode = (DWORD)-1;
GetExitCodeProcess(pi.hProcess, &exitcode);
CloseHandle(devnull);
return exitcode;
#else
ostringstream oss;
oss << cmd << ' ' << params << " >" << FileSystem::DEVNULL;
return system(oss.str().c_str());
#endif
}
MetafontWrapper::MetafontWrapper (const string &fname)
: _fontname(fname)
{
}
/** Calls Metafont and evaluates the logfile. If a gf file was successfully
* generated the dpi value is stripped from the filename
* (e.g. cmr10.600gf => cmr10.gf). This makes life easier...
* @param[in] mode Metafont mode, e.g. "ljfour"
* @param[in] mag magnification factor
* @return return value of Metafont system call */
int MetafontWrapper::call (const string &mode, double mag) {
if (!FileFinder::lookup(_fontname+".mf"))
return 1; // mf file not available => no need to call the "slow" Metafont
FileSystem::remove(_fontname+".gf");
#ifdef __WIN32__
const char *cmd = FileFinder::lookup("mf.exe", false);
#else
const char *cmd = "mf";
#endif
ostringstream oss;
oss << "\"\\mode=" << mode << ";"
"mag:=" << mag << ";"
"batchmode;"
"input " << _fontname << "\"";
Message::mstream(false, Terminal::CYAN) << "\nrunning Metafont for " << _fontname << '\n';
int ret = execute(cmd, oss.str().c_str());
// try to read Metafont's logfile and get name of created GF file
ifstream ifs((_fontname+".log").c_str());
if (ifs) {
char buf[128];
while (ifs) {
ifs.getline(buf, 128);
string line = buf;
if (line.substr(0, 17) == "Output written on") {
size_t pos = line.find("gf ", 18+_fontname.length());
if (pos != string::npos) {
string gfname = line.substr(18, pos-16); // GF filename found
FileSystem::rename(gfname, _fontname+".gf");
}
break;
}
}
}
return ret;
}
/** Calls Metafont if output files (tfm and gf) don't already exist. */
int MetafontWrapper::make (const string &mode, double mag) {
ifstream tfm((_fontname+".tfm").c_str());
ifstream gf((_fontname+".gf").c_str());
if (gf && tfm) // @@ distinguish between gf and tfm
return 0;
return call(mode, mag);
}
bool MetafontWrapper::success () const {
ifstream tfm((_fontname+".tfm").c_str());
ifstream gf((_fontname+".gf").c_str());
return tfm && gf;
}
/** Remove all files created by a Metafont call (tfm, gf, log).
* @param[in] keepGF if true, GF files won't be removed */
void MetafontWrapper::removeOutputFiles (bool keepGF) {
removeOutputFiles(_fontname, keepGF);
}
/** Remove all files created by a Metafont call for a given font (tfm, gf, log).
* @param[in] fontname name of font whose temporary files should be removed
* @param[in] keepGF if true, GF files will be kept */
void MetafontWrapper::removeOutputFiles (const string &fontname, bool keepGF) {
const char *ext[] = {"gf", "tfm", "log", 0};
for (const char **p = keepGF ? ext+2 : ext; *p; ++p)
FileSystem::remove(fontname + "." + *p);
}
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